CN101166050B - Radio communication method and system - Google Patents
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- CN101166050B CN101166050B CN2007101408022A CN200710140802A CN101166050B CN 101166050 B CN101166050 B CN 101166050B CN 2007101408022 A CN2007101408022 A CN 2007101408022A CN 200710140802 A CN200710140802 A CN 200710140802A CN 101166050 B CN101166050 B CN 101166050B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0822—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection according to predefined selection scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0604—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching with predefined switching scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
Abstract
Methods and systems for diversity processing based on antenna switching are disclosed. Aspects of one method may include switching among a plurality of antennas in a multi-antenna wireless terminal to receive packets. An antenna may receive a number of packets before switching to another antenna, where the number of packets may be pre-determined or dynamically determined. The received packets may be diversity processed where portions of a plurality of the received packets may be combined to form a single data packet. Similarly, antenna switching may also be used to transmit packets. For example, a data packet may be apportioned to a plurality of packets, and each of those packets may be transmitted via the antennas. Accordingly, if the number of packets to transmit is one, each antenna may transmit one packet, and the antenna switching may select another antenna with which to transmit a packet.
Description
Technical field
The present invention relates to radio communication, more particularly, relate to the method and system that a kind of diversity of switching based on antenna is handled.
Background technology
Wireless device adopts one or more antenna received RF signal.But the signal that antenna receives may be received the influence of signal transmission path and this reception antenna characteristic.For example, transmission path may comprise the barrier that can reflect and/or weaken transmission signals, for example building and/or tree.Except the influence of barrier in the delivering path, reception antenna also may be tuned to can receive the frequency of ideal communication channel.For example, because the tolerance of physical device and/or the error of manufacturing, actual receiving circuit may depart from designed receiving circuit.Add, reception antenna may receive the interference signal from ideal communication channel, reduces signal to noise ratio, thereby increases the demodulation difficulty to ideal signal.If interference signal is too strong, the signal that radio system can not receive fully and demodulate reception arrives.
Some design is adopted many antennas to receive and/or is transmitted, and in this case, these many antennas may be delivered to radio-frequency front-end with the radiofrequency signal transmission that receives separately, can send signal simultaneously at this each antenna.But these multiaerial systems need be used many antennas radio frequency to transmit and/or receive processing chain, have increased the cost of wireless device.In addition, transmit simultaneously and the time operation of a plurality of radio-frequency front-end needs to consume extra power by many antennas, thereby be difficult to extensive use, for move use all the more so.
Each feature that compares the follow-up system that will introduce in conjunction with the accompanying drawings of the present invention, other limitation and drawback existing and conventional art are conspicuous for the person of ordinary skill of the art.
Summary of the invention
The invention provides system and/or method that a kind of diversity of switching based on antenna is handled, carried out representing fully and describing in conjunction with at least one width of cloth accompanying drawing, and obtained more complete elaboration in the claims.
According to an aspect of the present invention, provide a kind of method of wireless communication, having comprised:
Switch between a plurality of antennas in multi-antenna terminal to receive a plurality of continuous data bags;
The described a plurality of continuous data bags of combination in the diversity processing procedure; And.
When receiving described a plurality of continuous data bag, reconfigure each in described a plurality of antenna, with by at least one frequency running in a plurality of different center frequency in the particular range.
Preferably, described method further comprise receive the individual data bag after, switch in described a plurality of antenna another.
Preferably, described method further comprise receive a plurality of packets after, switch in described a plurality of antenna another.
Preferably, described method further is included in from one of described a plurality of antennas and switches to before another, dynamically changes received quantity of data packets.
Preferably, the dynamic change of received data packet number is based in signal to noise ratio, the indication of received signal intensity, the bit error rate (BER) at least one before the described switching.
Preferably, at least a portion of each of wherein a plurality of packets that receive and individual data package close.
Preferably, described method further comprises the described a plurality of packets that receive of buffer memory, handles to carry out described diversity.
Preferably, described method further is included between a plurality of antennas in the described multi-antenna terminal to be switched, to transmit described a plurality of continuous data bag.
Preferably, described method comprises that further distribution is from the data as individual data bag in a plurality of packets of a plurality of continuous data bag transmission.
Preferably, described method further comprises based at least a in following described a plurality of packets that receive of combination in diversity is handled: Viterbi (Viterbi) algorithm and least-mean-square error algorithm.
According to an aspect of the present invention, provide a kind of system of radio communication, having comprised:
Commutation circuit is used for switching between a plurality of antennas of multi-antenna terminal, to receive a plurality of continuous data bags;
Baseband processor is used at the described a plurality of continuous data bags of diversity processing procedure combination; And
Antenna tuning circuit is used for reconfiguring each in described a plurality of antenna when receiving described a plurality of continuous data bag, with by at least one frequency running in a plurality of different center frequency in the particular range.
Preferably, described commutation circuit switches in described a plurality of antenna another after receiving the individual data bag.
Preferably, described commutation circuit after receiving a plurality of packets, switches in described a plurality of antenna another.
Preferably, described system further comprises and is used for dynamically changing the circuit of received data packet number before switching to another from of described a plurality of antennas.
Preferably, the dynamic change of received data packet number is based in signal to noise ratio, the indication of received signal intensity, the bit error rate (BER) at least one before the described switching.
Preferably, described baseband processor is closed each at least a portion and individual data package of a plurality of packets that receive.
Preferably, the described a plurality of packets that receive of described baseband processor buffer memory are handled to carry out described diversity.
Preferably, switch between a plurality of antennas of described commutation circuit in described multi-antenna terminal, to transmit described a plurality of continuous data bag.
Preferably, described baseband processor is distributed from the data as individual data bag in a plurality of packets of a plurality of continuous data bag transmission.
Preferably, described baseband processor is based at least a in following described a plurality of packets that receive of combination in diversity is handled: Viterbi (Viterbi) algorithm and least-mean-square error algorithm.
Various advantage of the present invention, various aspects and character of innovation, and the details of the embodiment of example shown in it will describe in detail in following description and accompanying drawing.
Description of drawings
Fig. 1 is the block diagram according to the wireless terminal of the embodiment of the invention;
Fig. 2 A is the canonical schema according to the antenna switching of the embodiment of the invention;
Fig. 2 B is the exemplary block diagram according to the antenna switching of the embodiment of the invention;
Fig. 3 is the exemplary block diagram of handling according to the diversity of the embodiment of the invention;
Fig. 4 is the typical chart according to the channel signal strength when the antenna frequency hopping causes that centre frequency changes of the embodiment of the invention;
Fig. 5 is the exemplary steps flow chart that switches the reception data according to the employing antenna of the embodiment of the invention;
Fig. 6 is the exemplary steps flow chart that switches the transmission data according to the employing antenna of the embodiment of the invention.
Embodiment
Embodiments of the invention relate to the system and method for the diversity processing of switching based on antenna.The various aspects of described method can be included in to be switched between a plurality of antennas in the multi-antenna wireless terminal to receive packet.Antenna can receive the packet of quantification before switching to another antenna.These received quantity of data packets before switching can be scheduled to, and also dynamically determine.Therefore, switching to before the next antenna, each antenna can receive the packet of some.Received quantity of data packets can be by signal to noise ratio (snr), received signal intensity indication (RSSI) and/or bit error rate (BER) (SNR) decision of antenna before these switched.The packet that receives can be stored in and carry out the diversity processing in the receiver.For example, the packet that receives by different antennas can be classified and store in order.The diversity processing procedure also can comprise combined reception to a plurality of packets in a part, form single packet.The diversity processing procedure also based on, for example, Viterbi (Viterbi) algorithm and/or lms algorithm.
In the another embodiment of the present invention, the antenna switching can be used for transmits data packets.For example, packet can be assigned to a plurality of packets, and each such packet can pass through antenna transmission.Therefore, be one if the quantity of data to be transmitted bag is specified, each antenna can transmit a packet, and the antenna switching can be selected different antenna transmission packets.In other words, be one if two antennas and specified quantity are arranged, continuous packet can be by carrying out alternate transmission between these two antennas.That antenna that is switched to will carry out the reception or the transmission of information, and this antenna is reconfigured, and make it in specific frequency range, can operate by in a plurality of different center frequency at least one at least.
Fig. 1 is the block diagram according to the wireless terminal of the embodiment of the invention.With reference to Fig. 1, shown wireless terminal 100, it comprises, for example, a plurality of antenna 105a...105b, radio-frequency front-end 110, baseband processor 114, processor 116, and system storage 118.Radio-frequency front-end 110 can comprise suitable logic, circuit and/or code, can be used for handling the RF signal that receives and/or will transmit.Radio-frequency front-end 110 can be connected with antenna 105 to receive and/or transmission signals.Radio-frequency front-end 110 can comprise the indication of received signal intensity (RSSI) circuit 111, antenna tuning circuit module 112 and antenna handover module 113.Received signal intensity indicating circuit 111 can comprise suitable logic, circuit and/or code, can generate received signal intensity.Antenna tuning circuit module 112 can comprise suitable logic, circuit and/or code, is used to regulate one of them centre frequency of antenna 105a...105b in use.The U.S. Patent application No. that files an application same date
11/536678(the case 17783US011 of lawyer's office) discloses a kind of detailed description of method and system of dynamically tuned antenna, and quotes in full in this application.Antenna handover module 113 can comprise suitable logic, circuit and/or code, and one of them carries out the reception or the transmission of radiofrequency signal to be used to select antenna 105a...105b.
For the signal that receives, radio-frequency front-end 110 can be to its demodulation before further handling.And radio-frequency front-end 110 can comprise other exemplary functions, for example, and with the signal filtering that receives, amplify and/or be down-converted to ultralow intermediate frequency (VLIF) and/or baseband signal.Radio-frequency front-end 110 can comprise intermediate frequency processor, but intermediate frequency processor digitlization intermediate-freuqncy signal, and numerical digit processing digitlization intermediate-freuqncy signal, be digital baseband signal with filtering and/or down-conversion digitlization intermediate-freuqncy signal.It is analog baseband signal that intermediate frequency processor then can transform the digitlization baseband signal.
Radio-frequency front-end 110 also can receive, for example, and from the numeral or the analog baseband signal of baseband processor 114.For example, baseband processor 114 can generate one or more signal, is delivered to radio-frequency front-end 110, carries out one or more function to control it.Therefore, in one embodiment of the invention, single or a plurality of signals that baseband processor 114 and/or processor 116 generate can be used for various elements in radio-frequency front-end 110, and for example filter is locked to ring (PLL) or synthesizer programming.Radio-frequency front-end 110 can carry out filtering, amplification and/or modulation to analog signal makes it pass through antenna 105 transmission.A part of radio-frequency front-end 110 as transmission process also can switch to analog signal with digital signal.
Baseband processor 114 can comprise suitable logic, circuit and/or code, is used to handle the baseband signal of the analog or digital that radio-frequency front-end 110 generates.Baseband processor 114 can be to radio-frequency front-end 110 transmission base bands, with the processing before transmitting.Baseband processor 114 also can comprise can be used for storing receive and/or with the buffer 114a of the data that are transmitted.Processor 116 can comprise suitable logic, circuit and/or code, is used to control the operation of radio-frequency front-end 110, antenna tuning circuit 112, antenna handover module 113 and/or baseband processor 114.For example, processor 116 can be used for upgrading or revises programmable parameter and/or numerical value in a plurality of assemblies, device and/or the treatment element in radio-frequency front-end 110, antenna tuning circuit 112, antenna handover module 113 and/or the baseband processor 114.Typical programmable parameter comprises the sky line options of amplifier gain, filter bandwidht, PLL parameter and/or antenna handover module 113.Control information and/or data message can be transferred to processor 116 by other controller and/or processor from wireless terminal 110.Similarly, processor 116 can transferring control information and/or data message other controller and/or processor in the wireless terminal 110.
System storage 118 can comprise suitable logic, circuit and/or code, is used to store a plurality of control informations and/or data message, comprises calculated rate and/or gain and/or frequency values and/or yield value parameters needed.System storage 118 also can be stored, for example, and the various parameters of antenna frequency hopping.The antenna frequency parameter can comprise, for example, determines centre frequency and the various antenna tuning circuit parameters of bandwidth and the impedance matching of antenna 105 and radio-frequency front-end 110 of antenna 105.Shen Qing Application No. 11/536682 on the same day, (acting on behalf of the case No.17784US01 of institute) discloses a kind of specific descriptions of antenna frequency hopping, quotes in full at this, for your guidance.
In the running, wireless terminal 100 can pass through antenna 105a...105b received RF signal.Wireless terminal 100 can be by switched antenna, receives packet through for example antenna 105a...105b, like this, in any fixed time, can provide the packet that receives to radio-frequency front-end 110 one of among the antenna 105a...105b.When wireless terminal 100 sent signal, baseband processor 114 can be to radio-frequency front-end 110 transfer data packets.Therefore, radio-frequency front-end 110 can send packet to the antenna of firm switching.After baseband processor 114 sent packet to radio-frequency front-end 110, baseband processor 114 can be provided with antenna handover module 113 to switch to another antenna.Thereby each antenna once transmits a packet.In another embodiment of the present invention, each antenna is switching to the packet that can transmit different given numbers before another antenna.
The quantity of data packets that each antenna receives may have nothing in common with each other.For example, if antenna 105a ratio antenna 105b has the indication of higher signal to noise ratio or received signal intensity, switching to before other antenna, but antenna 105a ratio antenna 105b receives the more data bag.Switching to the bit error rate (BER) that this antenna is received before other antenna quantity of data packets also depends on the data that receive from this antenna.For example, if the bit error rate (BER) of the packet that receives from antenna 105a that baseband processor is measured is lower than the bit error rate (BER) of the packet that receives from antenna 105b, switching to before other antenna, will be from the packet that antenna 105a receives more than the packet that receives from antenna 105b.Therefore, switching to before other antenna, the quantity of data packets that antenna receives is default or dynamically changes.
Yet different environmental conditions can cause the desirable centre frequency of carrier deviation.For example, if wireless terminal 100 is portable terminals, the inductance or the capacitance characteristic of palm of holding the user of portable terminal just may change centre frequency.Wireless terminal 100 may detect central frequency deviation and dynamic-configuration antenna tuning circuit module 112, makes centre frequency get back to the desired center frequency.Radio-frequency front-end 110, it can receive small-signal in ideal frequency, detect central frequency deviation.The acquisition of signal that can receive by processing is to central frequency deviation.For example, the increase of the bit error rate (BER) of the packet that baseband processor 114 can receive by detection, this is used to indicate the drift of centre frequency.
Signal strength indicator and/or bit error rate (BER) can send processor 116 to.Processor 116 can determine whether antenna tuning circuit 112 needs to reset.Therefore, processor 116 can transmit control accurately and/or data-signal is given antenna tuning circuit module 112, to reset and/or to retune antenna tuning circuit module 112.By the relevant information of processing received signal, but processor 116 dynamic adjustments centre frequencies are to reduce the influence that central frequency deviation brings.Processor 116 reconfigurable antenna tuning circuit modules 112 are with the bandwidth of adjusting antenna 105 and/or the matched impedance of antenna 105 and radio-frequency front-end 110.
Though among Fig. 1, other processor or controller of the present invention and at least one communicates, and is not limited to this.Therefore, have in the example, when control radio frequency transmission the time, processor 116 does not communicate with other processor.For example, in a kind of design of wireless terminal, can not adopt other processor except processor 116 or processor 116 all the required information of access control radio communication of having the right.In addition, received signal intensity indicating circuit 111 can be used as the part of radio-frequency front-end 110.But the present invention is not limited to this.For example, received signal intensity indicating circuit 111 can be positioned at before the radio-frequency front-end 110, as the part of radio-frequency front-end 110 and/or be positioned at after the radio-frequency front-end 110.
Fig. 2 A is the canonical schema according to the antenna switching of the embodiment of the invention.With reference to Fig. 2 A, show antenna 105a and 105b, bag stream (packet stream) 210 and 220 and superpacket stream 230.For example, antenna 105a can receive bag stream 210, and antenna 105b can receive bag stream 220.For example, antenna handover module 113 can be set, can receive packet M like this to select the input of antenna 105a.Receive after the packet M for example baseband processor 114 or processor 116 input of antenna handover module 113 of can resetting with reception antenna 105b.Therefore antenna 105b can receive packet M+1.The next packet that antenna handover module 113 receives from antenna 105a can then be set, for example packet M+2.
By receiving the mutual packet from antenna 105a and 105b, bag stream 210 can comprise packet M, M+2...N-2 and N, and bag stream 220 can comprise packet M+1, M+3...N-1 and N+1.The packet that receives can be stored into, for example, and buffer 114a or system storage 118.Information from bag stream 210 and 220 can be stored to constitute superpacket stream 230.Therefore, superpacket stream 230 can comprise packet M, M+1, M+2, M+3 ..., N-2, N-I, N and N+1.For example, baseband processor 114 and/or processor 116 can be handled the packet in the superpacket stream 230, to recapture base-band information.
Same, when the transmission data, can be sent to radio-frequency front-end 110 from the packet of superpacket stream 230, one of can be transferred among the antenna 105a...105b at this packet.Therefore, if packet transmits by antenna 105a and 105b, but antenna 105a transmission package stream 210, but antenna 105b transmission package stream 220.Baseband processor 114 switchable antennas, for example, after transmitting a packet or after receiving packet to radio-frequency front-end 110.Yet the present invention is not limited to this.For example, the antenna switching takes place after may or transmitting a plurality of packets in reception.
Fig. 2 B is the exemplary block diagram according to the antenna switching of the embodiment of the invention.With reference to Fig. 2 B, show antenna 105a and 105b, antenna handover module 113, low noise amplifier (LNA) 244 and power amplifier 246.Antenna handover module 113 can comprise switch 240 and duplexer (diplexer) 242.Switch 240 can comprise logic, circuit and/or code, makes low noise amplifier 244 can receive the data from antenna 105a or antenna 105b.Same, switch 240 can realize that data are from the transmission of power amplifier 246 to antenna 105a or 105b.Switch 240 can by, for example, from the signal sets of baseband processor 114 and/or processor 116.
Though antenna handover module 113 can be interpreted into 2 antenna systems, the present invention is not limited to this.For example, the antenna amount that comprises of radio terminal 110 can and be decided according to the design needs.
Fig. 3 is the exemplary block diagram of handling according to the diversity of the embodiment of the invention.With reference to Fig. 3, show data packet group 300 that comprises at least one packet and the frame group 320 that comprises at least one frame.The data packet group 300 of this at least one packet, as shown in the figure, but corresponding data bag 0 comprises the frame group 320 of at least one frame simultaneously to packet 7, as shown in the figure, can corresponding frame N-1 to frame N+1.Packet 300 can comprise tail position (TB) 302, first data bit 304, flag bit (F) 306, midamble sign indicating number 308, the second data bit 310, flag bit 312, tail position (TB) 314, guard bit (GP) 316. Tail position 302 and 314 can comprise 3 bits separately.First data bit 304 and second data bit 310 can comprise 57 bits separately.Flag bit 306 and 312 can comprise 1 bit separately.Midamble sign indicating number 308 can comprise 26 bits, and can be used as the training sequence of channel equalization.Frame 320 can comprise 8 parts or bit sequence.
As shown in the figure, packet 0 can be transferred to the 5th, the 6th, the 7th and 8 sequence of frame N-1 respectively to first data bit 304 in the packet 3.For example, packet 4 can be transferred to the 5th, the 6th, the 7th and 8 sequence of frame N respectively to first data bit 304 in the packet 7.For example, packet 0 can be transferred to the the the 1st, the 2nd, the 3rd and the 4th sequence of frame N respectively to second data bit 310 in the packet 3.For example, packet 4 can be transferred to the 1st, the 2nd, the 3rd and 4 sequence of frame N+1 respectively to second data bit 310 in the packet 7.The diversity processing procedure that is transferred to the bit sequence of packet from frame can utilize viterbi algorithm and/or Minimum Mean Square Error method (MMSE) algorithm to carry out the sequence number that utilizes when separating code searching with reduction.
Fig. 4 is the typical chart according to the channel signal strength when the antenna frequency hopping causes that centre frequency changes of the embodiment of the invention.In the chart that Fig. 4 shows, horizontal axis is represented frequency, vertical axis representation signal intensity.If frequency offset is between the centre frequency of ideal communication channel and for example antenna 105a, wireless terminal 110 may not be measured this frequency offset.Therefore, in an embodiment of the present invention, after switching to antennas such as for example antenna 105a, wireless terminal 110 can pass through tuned antenna 105a, and the centre frequency of antenna 105a is changed into different frequency, realizes antenna hopping.
For example, arrive, for example, be positioned at frequency f when the drift of practical center frequency
CFA Practical center frequency 405 time, ideal communication channel frequency and desired center frequency can be positioned at frequency f
DCThough wireless terminal 110 may not indicate practical center frequency 405 different with the desired center frequency, but still can use the antenna hop algorithm.Therefore, all can receive signal in different centre frequencies from ideal communication channel.For example, the first time, antenna hopping configurable antenna tuning circuit 112 was for being positioned at frequency f
CA1Centre frequency 413.Because centre frequency 413 can approach the ideal communication channel frequency f
DC, the centre frequency f of ideal communication channel
CA1Signal strength signal intensity 412 can be standard value 0.9.
Next antenna hopping configurable antenna tuning circuit 112 is for being positioned at frequency f
CA2Centre frequency 415.Owing to compare with centre frequency 413, centre frequency 415 may be more away from the ideal communication channel frequency f
DC, the centre frequency f of ideal communication channel
CA2Signal strength signal intensity 414 can be less standard value 0.4.The beamwidth of antenna that antenna hopping can be arranged to close on is overlapping.For example, the associated antenna bandwidth of centre frequency 413 can be overlapping with the associated antenna portions of bandwidth of centre frequency 415.
Like this, wireless terminal 110 can receive ideal communication channel signal from the different center frequency relevant with antenna 105a at different time.Therefore, wireless terminal 110 can compensate centre frequency need not to tell under the situation of accurate side-play amount.
Fig. 5 is the exemplary steps flow chart that switches the reception data according to the employing antenna of the embodiment of the invention.
Fig. 5 has described step 500 to 508.In step 500, antenna handover module 113 optional selecting antennas 105a are connected with radio-frequency front-end 110, and wherein antenna 105a may be first in the antenna 105a...105b tabulation.Baseband processor 114 or processor 116 for example, can be communicated by letter with antenna handover module 113 with the antenna that switches and select to be fit to.In step 502, but selected antenna received RF signal.This radiofrequency signal can be transferred to baseband processor 114 by radio-frequency front-end 110.Baseband processor 114 can be handled the signal that receives to generate packet.In step 504, the packet that is generated can be stored, for example, and in buffer 114a.Baseband processor 114 can further be handled the packet of storage to generate, for example the packet described in Fig. 3.For example, the part in a plurality of packets can be used for generating packet.
In step 506, baseband processor 114, whether for example, just can measure at the antenna of received RF signal is last antenna in antenna 105a...105b tabulation.If next procedure will be a step 500.Otherwise next procedure will be a step 508.In step 508, baseband processor 114 for example, can provide switching command to antenna handover module 113, makes it switch to next antenna in the antenna 105a...105b tabulation.
Fig. 6 is the exemplary steps flow chart that switches the transmission data according to the employing antenna of the embodiment of the invention.Fig. 6 has described step 600 to 606.In step 600, antenna handover module 113 optional selecting antennas 105a are connected with radio-frequency front-end 110, and at this, antenna 105a may be first in the antenna 105a...105b tabulation.Baseband processor 114 or processor 116 for example, can be communicated by letter with antenna handover module 113 with the antenna that switches and select to be fit to.In step 602, but selected antenna transmits data packets can be sent to baseband processor 114 by radio-frequency front-end 110 at this this packet.Fig. 3 is described as reference, and baseband processor 114 can generate the packet that is transferred to selected antenna from a plurality of packets.In step 604, baseband processor 114, whether for example, just can measure at the antenna of received RF signal is last antenna in antenna 105a...105b tabulation.If next procedure will be a step 600.Otherwise next procedure will be a step 606.In step 606, baseband processor 114 for example, can provide switching command to antenna handover module 113, makes it switch to next antenna in the antenna 105a...105b tabulation.
According to embodiments of the invention, the feature of canonical system comprises the antenna handover module 113 that can switch between the antenna 105a...105b in the wireless terminal 100.Antenna 105a...105b can receive the continuous data bag, can receive the packet of specific quantity at this each antenna.The packet of this specific quantity can be one or more packet.This packet that receives can be stored in, for example, and buffer 114a.Baseband processor 114 separable sets are handled the packet that is stored, and for example, make up a plurality of packets that receive.For example, the packet that part receives can be combined, and forms a packet.This packet can be similar to, for example, and packet 300.
Same, baseband processor 114 can be a plurality of packets with allocation of packets waiting for transmission, and Fig. 3 describes as reference, and each in a plurality of packets all can be sent to radio-frequency front-end 110.Radio-frequency front-end 110 can be handled these packets with the generation radiofrequency signal, and this radiofrequency signal can be sent to antenna 105a or 105b.After the packet of transmission specific quantity, baseband processor 114 switchable antennas.After certain antenna was selected, antenna tuning circuit 112 this antenna of can resetting made it at least operation in a plurality of different center frequency of a particular range.
Some embodiments of the present invention can be described at this, and diversity is handled and can be comprised the process that receives packet by a plurality of antennas.For example, one the packet of whenever being separated by can be received by antenna 105a, and remaining packet can be received by antenna 105b.Therefore, radio receiving terminal 100 can also store the packet classification that receives into buffer 114a in order.Can further handle the packet that is stored among the buffer 114a, for example, generate a packet with partial information according to a plurality of packets that stored.Yet the present invention is not limited to this.For example, diversity is handled the data that can only comprise that classification receives.Another embodiment of the present invention can adopt, and for example, other strategy of intercrossed data and/or forward error correction is realized the diversity processing.Diversity handle can based on, for example, viterbi algorithm and/or lms algorithm.Need the concrete diversity processing method of a plurality of packets to depend on design.
Another embodiment of the present invention can provide a kind of machine readable storage.The computer program of its stored comprises at least one code segment, shown at least one code segment carry out by machine and make described machine carry out above-mentioned steps, carry out diversity and handle to switch based on antenna.
Therefore, the present invention can pass through hardware, software, and perhaps soft, combination of hardware realizes.The present invention can realize with centralized system at least one computer system, perhaps be realized with dispersing mode by the different piece in the computer system that is distributed in several interconnection.Any computer system or miscellaneous equipment that can implementation method all be applicatory.The combination of software and hardware commonly used can be the general-purpose computing system that computer program is installed, and by installing and executive program control computer system, it is moved by method.
The present invention can also implement by computer program, and program comprises whole features that can realize the inventive method, when it is installed in the computer system, can realize method of the present invention.Computer program in the presents refers to: one group of any expression formula of instructing that can adopt any program language, code or symbol to write, this instruction group makes system have information processing capability, with direct realization specific function, or after carrying out following one or two step, realize specific function: a) convert other Languages, coding or symbol to; B) reproduce with different forms.
Though the present invention describes by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, at particular condition or material, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (6)
1. a method of wireless communication is characterized in that, comprising:
Switch between a plurality of antennas in multi-antenna terminal to receive a plurality of continuous data bags;
The described a plurality of continuous data bags of combination in the diversity processing procedure; And
When receiving described a plurality of continuous data bag, reconfigure each in described a plurality of antenna, with
By at least one the frequency running in a plurality of different center frequency in the particular range.
2. method according to claim 1 is characterized in that, described method further comprise receive the individual data bag after, switch in described a plurality of antenna another.
3. method according to claim 1 is characterized in that, described method further comprise receive a plurality of packets after, switch in described a plurality of antenna another.
4. method according to claim 1 is characterized in that, described method further is included in from one of described a plurality of antennas and switches to before another, dynamically changes received quantity of data packets.
5. the system of a radio communication is characterized in that, comprising:
Commutation circuit is used for switching between a plurality of antennas of multi-antenna terminal, to receive a plurality of continuous data bags;
Baseband processor is used at the described a plurality of continuous data bags of diversity processing procedure combination; And
Antenna tuning circuit is used for reconfiguring each in described a plurality of antenna when receiving described a plurality of continuous data bag, with by at least one frequency running in a plurality of different center frequency in the particular range.
6. system according to claim 5 is characterized in that, described commutation circuit switches in described a plurality of antenna another after receiving the individual data bag.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/536,666 US8116259B2 (en) | 2006-09-29 | 2006-09-29 | Method and system for diversity processing based on antenna switching |
| US11/536,666 | 2006-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101166050A CN101166050A (en) | 2008-04-23 |
| CN101166050B true CN101166050B (en) | 2011-09-07 |
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| CN2007101408022A Expired - Fee Related CN101166050B (en) | 2006-09-29 | 2007-08-01 | Radio communication method and system |
Country Status (6)
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| US (1) | US8116259B2 (en) |
| EP (1) | EP1906553B1 (en) |
| KR (1) | KR100931907B1 (en) |
| CN (1) | CN101166050B (en) |
| HK (1) | HK1118972A1 (en) |
| TW (1) | TWI393375B (en) |
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Also Published As
| Publication number | Publication date |
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| TWI393375B (en) | 2013-04-11 |
| US20080080452A1 (en) | 2008-04-03 |
| CN101166050A (en) | 2008-04-23 |
| US8116259B2 (en) | 2012-02-14 |
| EP1906553A1 (en) | 2008-04-02 |
| HK1118972A1 (en) | 2009-02-20 |
| KR20080030531A (en) | 2008-04-04 |
| EP1906553B1 (en) | 2011-12-21 |
| KR100931907B1 (en) | 2009-12-15 |
| TW200828848A (en) | 2008-07-01 |
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